Check Power Supply And Ground Circuit

WARNING: This page is about a different car, the 2006 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC PROCEDURE CHART

Step	Check	Yes	No
1 CHECK POWER SUPPLY. Disconnect the keyless entry control module harness connector. Measure the voltage between harness connector terminal and chassis ground. Connector & terminal (B176) No. 2,26 (+) - Chassis ground (-):	Is the voltage more than 10 V?	Go to step 2.	Check the harness for open circuits and shorts between the keyless entry control module and fuse.
2 CHECK GROUND CIRCUIT. Measure the resistance between harness connector terminal and chassis ground. Connector & terminal (B176) No. 14 - Chassis ground:	Is the resistance less than 10 Ω?	The power supply and ground circuit are OK.	Repair the harness.

Step

Check

Yes

1 CHECK POWER SUPPLY.

Disconnect the keyless entry control module harness connector.
Measure the voltage between harness connector terminal and chassis ground.
Connector & terminal

(B176) No. 2,26 (+) - Chassis ground (-):

Is the voltage more than 10 V?

Go to step 2.

Check the harness for open circuits and shorts between the keyless entry control module and fuse.

2 CHECK GROUND CIRCUIT.
Measure the resistance between harness connector terminal and chassis ground.

Connector & terminal

(B176) No. 14 - Chassis ground:

Is the resistance less than 10 Ω?

The power supply and ground circuit are OK.

Repair the harness.